106 lines
3.3 KiB
Python
Executable File
106 lines
3.3 KiB
Python
Executable File
#!/usr/bin/python3
|
|
# -*- coding: UTF-8 -*-
|
|
|
|
# GET me using a web browser,
|
|
# executing my code with a Python interpreter called by a CGI-compliant webserver!
|
|
# Example URI:
|
|
# http://www.example.org/path/main.py?title=title&author=author
|
|
# where:
|
|
# title:
|
|
# title of the book to filter (optional)
|
|
# author:
|
|
# author of the book to filter (optional)
|
|
#
|
|
# Every parameter is optional.
|
|
# Please note that not providing filters results in all books in the library.
|
|
|
|
# Useful libraries (no pun intended)
|
|
import xml.etree.ElementTree as ET
|
|
import json
|
|
import sys
|
|
import cgitb, cgi
|
|
import zipfile
|
|
from io import BytesIO
|
|
import shutil as sh
|
|
import os
|
|
import time
|
|
# Connection to remote library file
|
|
import requests
|
|
# Parsing of HTTP RFC 1123 datetime format
|
|
from email.utils import parsedate_to_datetime
|
|
|
|
# Our custom library (again no pun intended)
|
|
import tcparser
|
|
|
|
import glob
|
|
|
|
# Start CGI handling for webserver
|
|
cgitb.enable()
|
|
inputvars = cgi.FieldStorage()
|
|
|
|
print('Content-Type: text/json; charset=utf-8')
|
|
print('Access-Control-Allow-Origin: *')
|
|
print()
|
|
### End of HTTP headers: it is now safe to output things
|
|
##########################################################
|
|
|
|
# Create output directory and temporary files if they do not exist
|
|
if not os.path.exists(glob.conf['default']['outdir']):
|
|
os.mkdir(glob.conf['default']['outdir'])
|
|
if not os.path.exists(glob.conf['default']['outdir'] + '/lastupdate.txt'):
|
|
luh = open(glob.conf['default']['outdir'] + '/lastupdate.txt', 'w')
|
|
luh.write('0')
|
|
luh.close()
|
|
|
|
# Retrieve last database update timestamp
|
|
luh = open(glob.conf['default']['outdir'] + '/lastupdate.txt', 'r')
|
|
lu = int(float(luh.read()))
|
|
luh.close()
|
|
|
|
# Fetch last modified from HTTP header
|
|
path = glob.conf['default']['path']
|
|
user = glob.conf['default']['user']
|
|
pswd = glob.conf['default']['pswd']
|
|
req = requests.head(path, auth=(user, pswd))
|
|
|
|
cachefile = glob.conf['default']['outdir'] + "/tellico.xml"
|
|
|
|
# If header fetch fails I can't update cache.
|
|
# Try with current one, if exists
|
|
if req.status_code == 200 and 'Last-modified' in req.headers:
|
|
mtime = parsedate_to_datetime(req.headers['Last-modified']).timestamp()
|
|
|
|
# If local xml is out-of-date or missing, try download it
|
|
if int(lu) < int(mtime) or not os.path.isfile(cachefile):
|
|
# Download Tellico .tc database
|
|
req = requests.get(path, auth=(user, pswd))
|
|
if req.status_code == 200 and req.content != None:
|
|
# Unzip Tellico .tc database and "cache it" locally
|
|
zipHandler = zipfile.ZipFile(BytesIO(req.content), 'r')
|
|
zipHandler.extractall(glob.conf['default']['outdir'])
|
|
zipHandler.close()
|
|
luh = open(glob.conf['default']['outdir'] + '/lastupdate.txt', 'w')
|
|
luh.write(int(mtime))
|
|
luh.close()
|
|
|
|
# Get a Python-friendly library struct from XML file
|
|
library = tcparser.getLibrary(cachefile, lu)
|
|
# TODO: properly handle missing file errors or things like this
|
|
|
|
### Get filters to search for books ###
|
|
try:
|
|
title = inputvars['title'].value
|
|
except KeyError:
|
|
title = ''
|
|
|
|
try:
|
|
author = inputvars['author'].value
|
|
except KeyError:
|
|
author = ''
|
|
|
|
|
|
result = tcparser.filter(library, title=title, author=author)
|
|
|
|
# Wanna get a pretty JSON encoded library to do your nasty things offline at home? ;-)
|
|
print(json.dumps(result, indent=4))
|